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C# Regular Expressions for Matching “ABAB”, “AABB”, “ABB”, “AAB”, “ABAC” and “ABCB&r
by drnickriviera in Programming Languages

I'm frustrated with composing regular expressions for Matching "ABAB", "AABB", "ABB", "AAB", "ABAC" and "ABCB".

Let's take "ABAB" for example, all the following string will be matched:


Which means the RegEx should match a string whose 1st and 3rd characters are same, and 2nd and 4th are also s

pdfkit command failed: “/usr/bin/wkhtmltopdf” “--page-size” “Letter” “… ”--quiet“ ”
by Bjørn Håkon in Programming Languages

i'm using pdfkit for generating pdf when i generate pdf it gives me following error.

command failed: "/usr/bin/wkhtmltopdf" "--page-size" "Letter"
"--margin-top" "0.75in" "--margin-right" "0.75in" "--margin-bottom"
"0.75in" "--margin-left" "0.75in" "--encoding" "UTF-8" "--print-media-type"
"--quiet" "-" "-"

Any help?


Definitions of “primitive”, “value type”, “struct”, “class”, “wrap” in Java and C#
by Jim Davis in Java

I have been trying to understand the use of "primitives" in Java and C# and the difference between them (if any). I have asked a series of questions on SO and some of the answers seem to confuse the issue rather than clarify it. Some answers (and some MS documentation) appear to provide contradictory statements. From SO


python format datetime with “st”, “nd”, “rd”, “th” (english ordinal suffix) like PHP's “S&rd
by Tridnewly in PHP

I would like a python datetime object to output (and use the result in django) like this:

Thu the 2nd at 4:30

But I find no way in python to output st, nd, rd, or th like I can with PHP datetime format with the S string (What they call "English Ordinal Suffix") (http://uk.php.net/manual/en/funct

how to convert Photoshop layer effects(“Inner Shadow”,“Outer Glow”,“Bevel and Emboss”,“Color Overlay,”
by jcwagers in Development Tools & Services

I tried to import ".psd" file in Expression blend 4.But there is no way to get ayer effects("Inner Shadow","Outer Glow","Bevel and Emboss","Color Overlay,"Gradient Overlay") as Editable.
is there Any other way to convert those layer style to Editable code(xaml file).

Facebook App - {“error”:{“message”:“(#1) An error occured while creating the share”,“type”:“OAut
by Salikh in Development Tools & Services

When my app tries to post on "friends wall" sometimes i receive this error:

{"message":"(#1) An error occured while creating the share",

I'm sure to have (and to use) long access_token and publish_stream permission, in fact sometimes it works and sometim

How to implement the “Edit” menu with “Undo”, “Cut”, “Paste” and “Copy”?
by Steve O. in Development Tools & Services


for one of my applications I'm trying to implement an "Edit" menu. This menu usually has the standard-entries Undo, Cut, Copy and Paste.

This menu is not there by default, and users seem to expect it especially on Mac OS X.

Is there a an easier way of implementing this, without doing so in every widget manually? Since most widgets have the copy/pas

Error while validating HTML “document type does not allow element ”li“ here; missing one of ”ul“, ”ol“, &rdq
by ti22 in Web Design

So I'm trying to code something on wordpress for the first time but the validator doesn't seem to like me. Look at the error I got while validating:

Line 87, Column 33: document type does not allow element "li" here; missing one of "ul", "ol", "menu", "dir" start-tag

I've searched everywhere, I'm not aware of any missing or misplaced li or ul tags

Can I access elements/methods named “button1” “button2” “button3” etc. using “buttoni” inside a for-lo
by InfiniteLurker in Programming Languages

I have a bunch of buttons named:


Is there a way to basically do this?

for(int i = 1, i < 15, i++) {
button{i}.selected = YES;

This also goes for method calls, etc. I've often thought such a way of calling methods would be very convenient, but I d

PHP [Array Keys] : Convert “0” Into “A”, “1” Into “B”… (and so “89” will be “
by Damien in Programming Languages

Let's say I have an array like this:

$array = array

How can I create a function that converts 0 into "A", 1 into "B"...? Using Foreach or...?

So that instead of

[0] => this
[1] => is
[2] =>

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